A liquid control water valve for use in a coal mine and a liquid control method thereof

Abstract

The present application belongs to mechanical technical field, disclose a kind of liquid control water valve for underground coal mine, including valve seat and the valve core being located in the valve seat, the axial two sides of this valve seat are symmetrically provided with end cap, the central channel of end cap is provided with piston, the piston in the two side end caps respectively acts on the two ends of valve core, end cap is provided with plug in the end away from valve seat, the central channel of one end cap and between plug and piston is provided with spring;Valve seat is provided with oil port T and oil port P, which are independent of each other and respectively send hydraulic oil to the central channel of two end caps to act on the piston;Water inlet cavity B and water outlet cavity A are provided in the valve seat and separated by a convex ring, and the inner passage of the convex ring is matched with the outer wall of the valve core to block or conduct water inlet cavity B and water outlet cavity A.The water flow in the device only contacts the valve seat and the valve core, reducing the risk of failure caused by water corrosion of other parts, prolonging the service life.The present application also provides a kind of liquid control method.

Description

Technical Field

[0001] This invention belongs to the field of mechanical design and is applied to automated drilling rigs in coal mines. Specifically, it relates to a hydraulically controlled water valve for use in underground coal mines and its hydraulic control method. Background Technology

[0002] In coal mine automated drilling rigs, injecting water into the borehole is an essential step during drilling operations. To achieve automatic control of the water system, a hydraulically controlled water circuit switch device has been developed. This device can not only be used for switching the water circuit during drilling operations on automated coal mine drilling rigs, but also achieve automatic control of the water circuit using the rig's hydraulic system. This will further improve the automation level of automated drilling rigs, reduce the need for manual operation, and increase production efficiency and safety.

[0003] Although this device utilizes the drilling rig's hydraulic system to control the water system's switching, improving drilling efficiency and safety, the water supplied in coal mines contains a significant amount of minerals and is acidic and corrosive. This water quality can damage components of the water system switching device, severely impacting its lifespan. Current water system switching devices have complex structures with numerous components passing through the water pipes, and the risk of component failure due to water corrosion is relatively high, resulting in a shorter lifespan. Therefore, it is necessary to optimize and improve the device structure to reduce the impact of mineral corrosion, thereby extending its service life. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a hydraulically controlled water valve for underground coal mines with a reasonable structural design and strong practicality, and to improve the service life of the device.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a hydraulically controlled water valve for use in coal mines, comprising a valve seat and a valve core disposed within the valve seat. The valve seat has end caps symmetrically arranged on both axial sides. A piston is disposed within the central channel of each end cap. The pistons within the two end caps act on the two ends of the valve core, respectively. A plug is disposed at the opposite end of the end cap from the valve seat. A spring is disposed within the central channel of one of the end caps, between the plug and the piston. The valve seat has independent ports T and P that supply hydraulic oil to the central channels of the two end caps to act on the pistons. The valve seat has an inlet chamber B and an outlet chamber A separated by a convex ring. The channel within the convex ring is adapted to the outer wall of the valve core to isolate or connect the inlet chamber B and the outlet chamber A.

[0007] Optionally, the plug is connected to the end cap by threads, and the plug has a hexagonal countersunk groove.

[0008] Optionally, the valve core is configured as a dumbbell-shaped structure, consisting of a shaft and shoulders I and II located on both sides of the shaft. The outer diameter of the shaft is smaller than the inner diameter of the convex ring, and the outer diameters of shoulders I and II are adapted to the inner diameter of the convex ring.

[0009] Optionally, the hydraulic circuit of the end cap is provided with a stepped hole for installing a gasket at the connection between the hydraulic circuit of the valve seat and the end cap.

[0010] Optionally, the end cap has an exhaust groove on the corresponding side facing the valve seat for connecting the central channel to the outside.

[0011] Optionally, the end cap has a through hole for connecting the valve seat on the corresponding side facing the valve seat, and the valve seat has a threaded connection hole corresponding to the through hole of the end cap.

[0012] Optionally, the outer wall of the piston is provided with spaced sealing ring grooves I and II. Sealing ring I is provided on sealing ring groove I and sealing ring II is provided on sealing ring groove II. Sealing ring groove III is provided on the valve seat and located outside the water inlet chamber B and water outlet chamber A. Sealing ring II is provided on sealing ring groove III.

[0013] Optionally, the piston face facing the plug is provided with a circumferential oil guide ring, a radial oil guide groove and an axial chamber. Multiple radial oil guide grooves are provided, and the two ends of the multiple radial oil guide grooves are respectively connected to the circumferential oil guide ring and the axial chamber.

[0014] Optionally, the end cap is provided with an oil port M for connecting to the central channel.

[0015] This invention also proposes a hydraulic control method based on the aforementioned hydraulic control valve for underground coal mines, comprising the following steps: connecting the oil port P and oil port T of the hydraulic control valve to the hydraulic system of an automated drilling rig, and connecting the inlet chamber B and outlet chamber A to the water circuit system; when no hydraulic oil is flowing into either oil port P or oil port T, a spring provides a rightward thrust to the piston inside the end cover on its side, pushing the valve core to the right limit position, and the shoulder I on the valve core closes the inner channel of the convex ring between the inlet chamber B and the outlet chamber A, so that the hydraulic control valve is in a normally closed state; when there is hydraulic oil flowing into oil port P... When hydraulic oil is introduced, it provides a leftward thrust to the piston inside the right end cover, causing the valve core to overcome the spring force at the left end and move to the left. The shaft on the valve core then opens the inner channel of the convex ring between the inlet chamber B and the outlet chamber A, thus opening the hydraulic control water valve. When hydraulic oil is introduced at the oil port T, it provides a rightward thrust to the piston inside the left end cover. Combined with the spring force, this causes the valve core to move to the right, and the shoulder I on the valve core closes the inner channel of the convex ring between the inlet chamber B and the outlet chamber A again, thus closing the hydraulic control water valve.

[0016] The beneficial effects of this invention are as follows: In this hydraulically controlled water circuit switch device, the water flow can only contact the valve seat and the valve core, reducing the risk of other components failing due to water corrosion and extending their service life; at the same time, as a key component, the spring has its central hole in the end cap filled with oil for a long time, which completely isolates the spring surface from oxygen, reducing the risk of oxidation of the spring surface and protecting the spring; two hydraulic control ports are also provided on the water valve to facilitate the installation of a reversing solenoid valve for electromagnetic control.

[0017] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 A schematic diagram of a hydraulically controlled water circuit switch device;

[0020] Figure 2 This is a schematic diagram of the plug structure;

[0021] Figure 3 This is a schematic diagram of the end cap structure;

[0022] Figure 4 This is a schematic diagram of the piston structure;

[0023] Figure 5 This is a schematic diagram of the valve seat structure;

[0024] Figure 6 This is a schematic diagram of the valve core structure;

[0025] Explanation of reference numerals in the attached figures:

[0026] 1-Plug, 2-End cap, 3-Spring, 4-Piston, 5-Valve seat, 6-Valve core, 7-Sealing gasket, 8-Sealing ring I, 9-Sealing ring II;

[0027] 101 - Hexagonal countersunk groove; 102 - Thread;

[0028] 201-Oil port M, 202-Through hole, 203-Stepped hole, 204-Central channel, 205-Vent groove;

[0029] 401-Sealing ring groove I, 402-Sealing ring groove II, 403-Radial oil guide groove, 404-Axial chamber, 405-Circumferential oil guide ring;

[0030] 501-Threaded connection hole, 502-Oil port T, 503-Oil port P, 504-Sealing ring groove Ⅲ, 505-Water inlet chamber B, 506-Protruding ring, 507-Water outlet chamber A;

[0031] 601 - Shoulder I, 602 - Shaft, 603 - Shoulder II. Detailed Implementation

[0032] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0033] like Figure 1-6 As shown, the hydraulic control valve for underground coal mines mentioned in this embodiment includes a valve seat 5 and a valve core 6 disposed within the valve seat 5. End caps 2 are symmetrically arranged on both axial sides of the valve seat 5. A piston 4 is disposed in the central channel 204 of the end cap 2. The pistons 4 in the two end caps 2 act on the two ends of the valve core 6 respectively. A plug 1 is disposed at the opposite end of the end cap 2 away from the valve seat 5. A spring 3 is disposed in the central channel 204 of one of the end caps 2 and between the plug 1 and the piston 4. The valve seat 5 is provided with oil ports T502 and P503, which are independent of each other and respectively supply hydraulic oil to the central channels 204 of the two end caps 2 to act on the piston. The valve seat 5 is provided with an inlet chamber B505 and an outlet chamber A507 separated by a convex ring 506. The channel inside the convex ring 506 is adapted to the outer wall of the valve core 6 to isolate or connect the inlet chamber B505 and the outlet chamber A507.

[0034] Specifically, each side of the valve seat 5 has an end cap 2, and the other end of the end cap 2 has a plug 1. The valve core 6 is located in the through hole in the middle of the valve seat 5. Each side of the valve core 6 has a piston 4 that can slide axially inside the end cap 2, and the left end of the left piston 4 has a spring 3. A sealing gasket 7 is provided at the oil circuit connection between the L-shaped hydraulic oil circuit of the valve seat 5 and the T-shaped hydraulic oil circuit of the end cap 2. Sealing ring I 8 and sealing ring II 9 are provided at both ends of the outer cylindrical surface of the piston 4. Sealing ring II 9 is also provided on both sides of the through hole in the middle of the valve seat 5. The valve seat 5 has four evenly distributed threaded connection holes 501 on each of its left and right end faces. On its upper end face, there are two L-shaped hydraulic oil circuits connecting oil ports T502 and P503. Oil port P503 connects to the T-shaped hydraulic oil circuit of the right end cover 2 via the right-side L-shaped hydraulic oil circuit, and oil port T502 connects to the T-shaped hydraulic oil circuit of the left-side L-shaped hydraulic oil circuit. Sealing ring grooves Ⅲ504 are provided on both sides of the through-hole in the middle of the valve seat 5 to hold sealing ring Ⅱ9. The water inlet chamber B505 connects to the water inlet of the water system, and the water outlet chamber A507 connects to the water outlet of the water system. The convex ring 506 in the middle of the valve seat 5 separates the water inlet chamber B505 and the water outlet chamber A507, forming an annular channel. The end cover 2 has an oil port M201, a stepped hole 203, and a central channel 204, which are interconnected based on the T-shaped hydraulic oil circuit. The oil port M201 has threads for installing a standard plug or pressure gauge. In different examples, the oil ports M on the two end caps can also replace the oil ports T and P on the valve seat. The stepped hole 203 can communicate with the L-shaped hydraulic oil circuit on the valve seat 5, and its step is used to place the sealing gasket 7. One end of the central channel 204 is threaded for installing the plug 1, and the other end can hold the piston 4, which can move horizontally within the central channel 204. The side of the end cap 2 has a vent groove 205. The side of the end cap 2 has four through holes 202, which can be connected to the valve seat 5 by mounting screws. The two ends of the cylindrical surface of the piston 4 are respectively provided with sealing ring grooves I 401 and II 402 for installing sealing rings I 8 and II 9. Four radial oil guide grooves 403 and a circumferential oil guide ring 405 are symmetrically opened on the right end face of the piston 4 for oil communication between the piston 4 and the end cap 2. The valve core 6 can move horizontally on the convex ring 506 of the valve seat 5 under the action of the pistons 4 on both sides. Shoulders I 601 and II 603 are provided at both ends of the shaft 602. Shoulders I 601 and II 603 have the same cross-sectional area, but I 601 is larger than the cross-sectional area of ​​the shaft 602. Shoulder I 601 is longer than shoulder II 603. The plug 1 can be installed onto the end cover 2 by thread 102, and has a hexagonal countersunk groove 101 on the side for easy installation and removal with an Allen wrench.

[0035] Working process of this hydraulically controlled water circuit switch device:

[0036] Connect oil ports P503 and T502 of this device to the hydraulic system of the automated drilling rig, and connect water inlet chamber B505 and water outlet chamber A507 to the water circuit system. When no pressurized oil flows through oil ports P503 and T502, the spring force of spring 3 acts on the left piston 4, causing it to move to the right. Piston 4 pushes valve core 6 to its right limit position. At this time, the channel of convex ring 506 connecting water inlet chamber B505 and water outlet chamber A507 is closed by the shoulder I601 on valve core 6, and the water flow in water in inlet chamber B505 cannot reach water outlet chamber A507, so the device is in a normally closed state.

[0037] When pressurized hydraulic oil is introduced through port P503, the hydraulic oil flows through the pipe, through valve seat 5, into right end cover 2, and finally into the circumferential chamber 404 of right piston 4, causing right piston 4 to move to the left. Right piston 4 pushes valve core 6 to the left. Valve core 6 overcomes the elastic force of left end spring 3 and moves to the left. At this time, the channel of convex ring 506 between water outlet chamber A507 and water inlet chamber B505 is opened, and the device is in the open state.

[0038] When pressurized hydraulic oil is introduced into the oil port T502, the hydraulic oil will pass through the pipeline and valve seat 5 into the left end cover 2, and finally reach the circumferential chamber 404 of the left piston 4. The pressure of the hydraulic oil and the elastic force of the spring 3 work together to move the left piston 4 to the right. The left piston 4 pushes the valve core 6 to the right. The valve core 6 moves to the right. At this time, the channel of the convex ring 506 between the water outlet chamber A507 and the water inlet chamber B505 is blocked again by the shoulder I601, and the device is in the closed state.

[0039] Using the above scheme, the left and right movement of the valve core in this hydraulically controlled water circuit switch device is controlled by adjusting the pressure of the hydraulic oil, and the left and right movement of the valve core can control the opening and closing of the water circuit. When the piston and the plug are in contact, the radial oil guide groove and the circumferential oil guide ring on the piston can connect the hydraulic oil in the axial chamber of the piston with the T-shaped hydraulic oil circuit on the end cover. At the same time, the surface of the end cover that contacts the valve seat is provided with an exhaust groove, which facilitates the axial sliding of the piston in the central channel of the end cover.

[0040] It should be noted that the directional terms such as "left side", "right side", "to the right", and "to the left" used in the above hydraulic control method are based on the setting position of the spring equivalent to the valve seat and are not specifically limited.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A hydraulically controlled water valve for use in coal mines, comprising a valve seat (5) and a valve core (6) disposed within the valve seat, characterized in that, The valve seat has end caps (2) symmetrically arranged on both sides of the axial direction. A piston (4) is arranged in the central channel (204) of the end cap. The pistons in the two end caps act on the two ends of the valve core respectively. A plug (1) is arranged on the opposite end of the end cap away from the valve seat. A spring (3) is arranged in the central channel of one of the end caps and between the plug and the piston. The valve seat has oil ports T (502) and P (503) that are independent of each other and respectively supply hydraulic oil to the central channels of the two end caps to act on the piston. The valve seat has an inlet chamber B (505) and an outlet chamber A (507) separated by a convex ring (506). The channel in the convex ring is adapted to the outer wall of the valve core to isolate or connect the inlet chamber B and the outlet chamber A. The valve core is configured as a dumbbell-shaped structure, consisting of a shaft (602) and shoulders I (601) and II (603) located on both sides of the shaft. The outer diameter of the shaft is smaller than the inner diameter of the convex ring, and the outer diameters of shoulders I and II are adapted to the inner diameter of the convex ring. Connect the oil port P (503) and oil port T (502) of the hydraulic control water valve to the hydraulic system of the automated drilling rig, and connect the water inlet chamber B (505) and water outlet chamber A (507) to the water circuit system. When no hydraulic oil is introduced into either port P or port T, the spring provides a rightward thrust to the piston inside the end cover on its side, pushing the valve core (6) to the right limit position. The shoulder I (601) on the valve core closes the inner channel of the convex ring (506) between the inlet chamber B (505) and the outlet chamber A (507), so that the hydraulic control valve is in the normally closed state. When hydraulic oil is introduced into the oil port P, the hydraulic oil provides a leftward thrust to the piston inside the right end cover, causing the valve core to overcome the spring force at the left end and move to the left. The shaft (602) on the valve core opens the inner channel of the convex ring between the water inlet chamber B and the water outlet chamber A, so that the hydraulic control water valve is in the open state. When hydraulic oil is introduced into port T, the hydraulic oil provides a rightward thrust to the piston inside the left end cover. Under the combined action of the hydraulic oil and the spring force, the valve core moves to the right, and the shoulder I on the valve core closes the inner channel of the convex ring between the inlet chamber B and the outlet chamber A again, so that the hydraulic control water valve is in the closed state.

2. The hydraulic control valve for underground coal mines according to claim 1, characterized in that, The plug is connected to the end cap by a thread (102), and a hexagonal countersunk groove (101) is provided on the plug.

3. The hydraulic control valve for underground coal mines according to claim 1, characterized in that, The hydraulic circuit of the end cap is provided with a stepped hole (203) for installing a sealing gasket (7) at the connection between the hydraulic circuit of the end cap and the valve seat.

4. The hydraulic control valve for underground coal mines according to claim 1, characterized in that, The end cap has an exhaust groove (205) on the side facing the valve seat for connecting the central channel to the outside.

5. The hydraulic control valve for underground coal mines according to claim 1, characterized in that, The end cap has a through hole (202) for connecting to the valve seat on the side facing the valve seat, and the valve seat has a threaded connection hole (501) corresponding to the through hole of the end cap.

6. The hydraulic control valve for underground coal mines according to claim 1, characterized in that, The piston has circumferentially spaced sealing ring grooves I (401) and II (402), with sealing rings I (8) provided on the sealing ring groove I and II (9) provided on the sealing ring groove II. The valve seat has sealing ring grooves III (504) located on the outside of the water inlet chamber B (505) and the water outlet chamber A (507), with the sealing ring II provided on the sealing ring groove III.

7. The hydraulic control valve for underground coal mines according to claim 1, characterized in that, The piston face facing the plug is provided with a circumferential oil guide ring (405), a radial oil guide groove (403) and an axial chamber (404). Multiple radial oil guide grooves are provided, and the two ends of the multiple radial oil guide grooves are respectively connected to the circumferential oil guide ring and the axial chamber.

8. According to claim 1 7. The underground hydraulic control valve for coal mines as described in any one of the claims is characterized in that, The end cap is provided with an oil port M(201) for connecting to the central channel.

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